US4180689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for converting C3 -C12 hydrocarbons to aromatics over gallia-activated zeolite
Assignee: BP PLC
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Filing: 1978-12-11
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Granted: 1979-12-25
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Expires: 1998-12-11
Abstract
Abstract This case relates to a process for producing aromatics by contacting a C 3 -C 8 hydrocarbon with a gallium catalyst supported on an aluminosilicate in which the ratio of silica to alumina is between 20:1 and 70:1.
Inventors
- 👤 Evan E. Davies
- 👤 Alexander J. Kolombos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:38
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/061; B01J29/40; B01J29/405; B01J29/70; B01J29/7049; B01J29/7057; B01J29/7084; C; C07; C07C; C07C2/00; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/095; C07C2523/00; C07C2523/08; C07C2529/00; C07C2529/04; C07C2529/06; C07C2529/40; C07C2529/65; C07C2529/70
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
59 words
A process for producing aromatic hydrocarbons comprising bringing into contact at an elevated temperature a C 3 -C 12 hydrocarbon feedstock with a catalyst composition comprising an aluminosilicate having gallium deposited thereon or an aluminosilicate in which cations have been exchanged with gallium ions, said aluminosilicate having silica to alumina in a molar ratio of between 20:1 and 70:1.
Claim 2
Dependent Claim
59 words
A process for producing aromatic hydrocarbons comprising bringing into contact at an elevated temperature a C 3 -C 12 hydrocarbon feedstock with a catalyst composition comprising an aluminosilicate having gallium deposited thereon or an aluminosilicate in which cations have been exchanged with gallium ions, said aluminosilicate having silica to alumina in a molar ratio of between 20:1 and 70:1.
Claim 3
Dependent Claim
21 words
A process according to claims 1 wherein the hydrocarbon feedstock is a C 4 hydrocarbon containing isobutane, isobutene or mixtures thereof.
Claim 4
Dependent Claim
23 words
A process according to claim wherein gallium is impregnated on the aluminosilicate support as a compound giving rise to gallium oxide during activation.
Claim 5
Dependent Claim
19 words
A process according to claim 3 wherein the compound giving rise to gallium oxide during activation is gallium nitrate.
Claim 6
Dependent Claim
28 words
A process according to claim 1 wherein gallium ions have been exchanged with cations selected from a metal ion, an organic ion and a proton in the aluminosilicate.
Claim 7
Dependent Claim
16 words
A process according to claim 5 wherein the metal ion is selected from sodium and potassium.
Claim 8
Dependent Claim
84 words
A process according to claim 5 wherein the organic ion is represented by the formulae R 1 R 2 R 3 R 4 N + or an ion derived from the diamine R 1 R 2 N(CH 2 ) x NR 3 R 4 or pyrrolidine wherein R 1 , R 2 , R 3 and R 4 are H, CH 3 , C 2 H 5 , C 3 H 7 or C 4 H 9 and x=2, 3, 4, 5 or 6.
Claim 9
Dependent Claim
29 words
A process according to claim 1 wherein the amount of gallium present in the composition is between 0.1% and 10.0% by weight of the total aluminosilicate in the composition.
Claim 10
Dependent Claim
16 words
A process according to claim 1 wherein the catalyst composition is used as a fixed bed.
Claim 11
Dependent Claim
44 words
A process according to claim 1 wherein the catalyst composition is activated prior to contact with the hydrocarbon feedstock by heating at a temperature between 400° C. and 650° C. in an atmosphere of hydrogen, air or a gas inert under the reaction conditions.
Claim 12
Dependent Claim
33 words
A process according to claim 1 wherein the hydrocarbon feedstock is contacted with the catalyst composition at a temperature between 450 ° and 700° C. in an atmosphere inert under the reaction conditions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |